Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-01-17
Nucl.Phys. B582 (2000) 477-513
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTeX, 40 pages with 5 figures; corrected version published in Nucl. Phys. B
Scientific paper
10.1016/S0550-3213(00)00242-X
We study QCD-like theories with pseudoreal fermions at finite baryon density. Such theories include two-color QCD with quarks in the fundamental representation of the color group as well as any-color QCD with quarks in the adjoint color representation. In all such theories the lightest baryons are diquarks. At zero chemical potential $\mu$ they are, together with the pseudoscalar mesons, the Goldstone modes of a spontaneously broken enlarged chiral symmetry group. Using symmetry principles, we derive the low-energy effective Lagrangian for these particles. We find that a second order phase transition occurs at a value of $\mu$ equal to half the mass of the Goldstone modes. For values of $\mu$ beyond this point the scalar diquarks Bose condense and the diquark condensate is nonzero. We calculate the dependence of the chiral condensate, the diquark condensate, the baryon charge density, and the masses of the diquark and pseudoscalar excitations on $\mu$ at finite bare quark mass and scalar diquark source. The relevance of our results to lattice QCD calculations and to real three-color QCD at finite baryon density is discussed.
Kogut John B.
Stephanov Mikhail A.
Toublan Dominique
Verbaarschot Jacobus J. M.
Zhitnitsky Ariel
No associations
LandOfFree
QCD-like Theories at Finite Baryon Density does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with QCD-like Theories at Finite Baryon Density, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and QCD-like Theories at Finite Baryon Density will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-429617